Extract and set global parameters of lava. In particular optimization
parameters for the estimate function.
lava.options(...)list of parameters
param: 'relative' (factor loading and variance of one
endogenous variables in each measurement model are fixed to one), 'absolute'
(mean and variance of latent variables are set to 0 and 1, respectively),
'hybrid' (intercept of latent variables is fixed to 0, and factor loading of
at least one endogenous variable in each measurement model is fixed to 1),
'none' (no constraints are added)
layout: One of 'dot','fdp','circo','twopi','neato','osage'
messages: Set to 0 to disable various output messages
...
see control parameter of the estimate function.
if (FALSE) { # \dontrun{
lava.options(iter.max=100,messages=0)
} # }